锂电池管理芯片bq78pl114

FEATURES

APPLICATIONS

DESCRIPTION

bq78PL114

SLUS850B–SEPTEMBER2008–REVISED APRIL2009 PowerLAN™Master Gateway Battery Management Controller

With PowerPump™Cell Balancing Technology

–bq78PL114S12:<300µA Active,<185µA

Standby,<85µA Ship,and<1µA

•bq78PL114Designed for Managing3-to

Undervoltage Shutdown 8-Series-Cell Battery Systems

•Accurate,Advanced Temperature Monitoring •bq78PL114S12Firmware Upgrade Supports3-

of Cells and MOSFETs With up to12Sensors to12-Series-Cell Battery Systems

•Fail-Safe Operation of Pack Protection –Adds Support for LCD and Electronic Paper

Circuits:Up to Three Power MOSFETs and Displays or EPDs

One Secondary Safety Output(Fuse)–Configurable for11-A,26-A,or110-A

•Fully Programmable Voltage,Current,Balance, Operating Currents

and Temperature-Protection Features •Systems With More Than Four Series Cells

•External Inputs for Auxiliary MOSFET Control Require External bq76PL102Dual-Cell

Monitors•Smart Battery System1.1Compliant via

SMBus

•SmartSafety Features:

–Prevention:Optimal Cell Management

–Diagnosis:Improved Sensing of Cell

•Portable Medical Instruments and Test Problems Equipment

–Fail Safe:Detection of Event Precursors•Mobility Devices(E-Bike)

•Rate-of-Change Detection of All Important Cell•Uninterruptible Power Supplies and Hand-Held Characteristics:Tools

–Voltage

–Impedance

–Cell Temperature The bq78PL114master gateway battery controller is

part of a complete Li-Ion control,monitoring,and •PowerPump Technology Transfers Charge

safety solution designed for large series cell strings.

Efficiently From Cell to Cell During All

Operating Conditions,Resulting in Longer The bq78PL114and bq78PL114S12along with

bq76PL102PowerLAN™dual-cell monitors provide Run Time and Cell Life

complete battery-system control,communications,–bq78PL114S12Adds User-Configurable

and safety functions for a structure of three up to PowerPump Cell-Balancing Modes

twelve series cells.This PowerLAN system provides •High-Resolution18-Bit Integrating Delta-Sigma simultaneous,synchronized voltage and current Coulomb Counter for Precise Charge-Flow measurements using one A/D per-cell technology.

Measurements and Gas Gauging This eliminates system-induced noise from

measurements and allows the precise,continuous,•Multiple IndependentΔ-ΣADCs:One-per-Cell

real-time calculation of cell impedance under all Voltage,Plus Separate Temperature,Current,

operating conditions,even during widely fluctuating and Safety

load conditions.

•Simultaneous,Synchronous Measurement of

PowerPump technology transfers charge between Pack Current and Individual Cell Voltages

cells to balance their voltage and capacity.Balancing •Very Low Power Consumption is possible during all battery modes:charge,

–bq78PL114:<250µA Active,<150µA discharge,and rest.Highly efficient charge-transfer Standby,<40µA Ship,and<1µA circuitry nearly eliminates energy loss while providing

true real-time balance between cells,resulting in Undervoltage Shutdown

longer run-time and improved cycle life.

Please be aware that an important notice concerning availability,standard warranty,and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PowerLAN,PowerPump,bqWizard are trademarks of Texas Instruments.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.Copyright©2008–2009,Texas Instruments Incorporated Products conform to specifications per the terms of the Texas

Instruments standard warranty.Production processing does not

necessarily include testing of all parameters.